Make last access data public.

We should aim to do our last access datasets public. In order to do that we might need to drop the longtail for projects/countries in which there is a small number of views or rather, do not publish the country dimension.

Should we use cassnadra or dumps? Or both? This task will be done when we've had meetings and decided/designed what we're going to do. A part of that design will be ensuring privacy and security of the data. Also, we will decide the format of the data released and/or the query structure of a potential hyperswitch endpoint.